CVE-2021-31785

Description

The Bluetooth Classic implementation on Actions ATS2815 and ATS2819 chipsets does not properly handle the reception of multiple LMP_host_connection_req packets, allowing attackers in radio range to trigger a denial of service (deadlock) of the device via crafted LMP packets. Manual user intervention is required to restart the device and restore Bluetooth communication.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.10%
Vendor Advisory actions-semi.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.actions-semi.com/index.php?id=3581&siteId=4 broken link vendor advisory
https://launchstudio.bluetooth.com/ListingDetails/76427 third party advisory
https://dl.packetstormsecurity.net/papers/general/braktooth.pdf third party advisory technical description

Frequently Asked Questions

What is the severity of CVE-2021-31785?
CVE-2021-31785 has been scored as a medium severity vulnerability.
How to fix CVE-2021-31785?
To fix CVE-2021-31785, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-31785 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-31785 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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